Fossil plants, Vol. 2: A text-book for students of botany and geology

by A. C. Seward

[72] Crépin (75).

[73] Stur (75) A. p. 33.

[74] Carruthers (73).

[75] Gilkinet (75) figs. 2–5.

[76] Penhallow (92) p. 8.

[77] Smith and White (05) p. 58, Pls. V. VI.

[78] Kidston (86²) p. 232.

[79] Stur (81) Pls. III. IV.

[80] Jahn (03) p. 77.

[81] Smith and White (05) p. 63.